Cartons



United States Patent 3,332,599 CARTONS Erik Rune Jonson, Norrkoping, Sweden, assignor to Esseltepac Aktiebolag, Norrkoping, Sweden Filed Nov. 30, 1965, Ser. No. 510,535 Claims priority, application Sweden, Dec. 2, 1964, 14,529/64 4 Claims. (Cl. 229-14) This invention relates to a rectangular parallele-pipedical carton constituted on one hand by an integral blank of cardboard or like material which is divided by crease lines into four aligned panels of equal size at least in pairs for the formation of the sides of the carton, and into end flaps integral with said four panels and adapted to form the end closure members of the carton, and on the other hand by a lining unslit at the corners and projecting such a distance beyond the ends of the carton that it is closable by bellows folding at the carton ends, said lining for said bellows folding being glued to three integral end flaps while the fourth flap separated from the other fiaps and from the lining is adapted, in the sealed state of the carton, to form the cover (the bottom) of the carton. The essential characteristic features of the invention are that the intermediary one of the three integral end flaps is of a length equal to the width of those two opposed sides of the carton between which the flap is located, and that the lining projects equally far beyond the carton as the intermediary flap while the two outer ones of the three integral flaps is of a length smaller than that of the intermediary flap. By this arrangement the lining can be closed at its mouth, with lining material in application with lining material, by means of a pair of press jaws or like members one of which jaws engages the lining while the other jaw engages the outer edge portion of the intermediary flap, which implies the advantage that the cardboard flap which is resilient takes up irregularly distributed pressure. To this comes the advantage very important in connect-ion with cartons that the consumption of material is at a minimum.

The above and further features of the invention and the advantages gained thereby will be more fully explained in the following, reference being made to the accompanying drawing which illustrates an embodiment, chosen by way of example, of the carton according to the invention.

In the drawing:

*FIG. 1 is a developed plan view of part of the carton blank;

FIG. 2 is a perspective view of this part of the blank erected in a carton but not as yet sealed;

FIG. 3 is a perspective view of the erected carton in the sealed state.

The carton blank 1 of cardboard or like material is divided by longitudinal crease lines into five panels 2-6. The panels 2-5 which in pairs are of equal size are to constitute the carton sides, while the panel 6 is a glue panel which at the erection of the carton is to be glued to the panel 2.

Hinged to the panels 2-5 are end flaps 7-10 which are to form the end closure members of the carton. Said end flaps 7-10 are preferably provided at both ends of the panels 2-5. The end flaps 7-10 are delimited from the panels 2-5 by crease lines 11.

The blank 1 is provided with a lining 12 which is suited for sealing by application of heat and pressure or solely pressure and which wholly covers the inner side of the carton. However, the lining 12 could also be provided at the ends only of the panels 2-5. The lining 12 which is unslit at the corners projects such a distance beyond the panels 2-5 forming the carton sides that it 3,332,599 Patented July 25, 1967 is closable at the carton ends by bellows folding. To realize said bellows folding the lining 12 is glued to the three integral end flaps 8, 9 and 10. The fourth flap 7 which is separated from the other flaps 8-10 and the lining 12 is adapted in the sealed state of the carton to form the cover and the bottom, respectively, of the carton.

According to the invention, the intermediary end flap 9 of the three integral end flaps 8-10 is of a length which at least fundamentally is equal to the width of those two opposed sides 3 and 5 of the carton between which the flap 9 is located. Besides the lining 12 projects equally far beyond the carton as the intermediary flap 9, while the two outer flaps 8 and 10 of the three integral end flap-s 8-10 are of a length smaller than that of the intermediary flap 9.

In an embodiment the two outer flaps 8 and 10 are substantially half as long as the intermediary flap 9 and provided with crease lines 13 which extend from the inner corners and preferably are punched through at points, said crease lines converging at the middle of the outer edges of the fiaps 8 and 10. The crease lines 13 make an angle of approximately 45 with the crease line 11; the deflection, if any, from 45 is dependent upon the cardboard thickness.

In the preferred embodiment illustrated the two outer flaps 8 and 10 at the outer edges are provided with narrow tongues 14 projecting from the middle of one edge of the flaps 8 and 10 and delimited from the flaps 8 and 10 by a crease line 15 preferably punched through at points and diverging slightly from the crease line 11 by reason of the cardboard thickness. The tongues 14 of which the edges 16 extend along the axis of the sides 3 and 5, effectively contribute to the bellows folding of the lining 12.

The narrow tongues 14 preferably extend to the edges of the two outer flaps 8 and 10 facing the flap 7 which projects equally far beyond the carton sides as the tongues 14. The flap 7 preferably is of a length which is three quarters of that of the intermediary flap 9.

The above embodiment of the invention was described for purposes of illustration rather than limitation. Variations and modifications of the invention are possible within the scope of the appended claims.

What I claim and desire to secure by Letters Patent is:

1. A rectangular parallelepipedical carton constituted on one hand by an integral blank of cardboard or like material which is divided by crease lines into four aligned panels in pairs of equal size for the formation of the sides of the carton, and into end flaps integral with said four panels and adapted to form the end closure members of the carton, and on the other 'hand by a lining unslit at the corners and projecting such a distance beyond the ends of the carton that it is closable by bellows folding at the carton ends, said lining for said bellows folding being glued to three integral end flaps while the fourth flap separated from the other flaps and from the lining is adapted, in the sealed state of the carton, to form a closure of the carton, wherein the intermediary one of the three integral end flaps is of a length equal to the width of those two opposed sides of the carton between which the flap is located, and the lining projects equally far beyond the carton as said intermediary flap while the two outer ones of the three integral flaps are each of a length smaller than that of said intermediary flap.

2. A carton in accordance with claim 1, wherein the two outer flaps of said three integral flaps are esentially half as long as said intermediary flap and provided with crease lines extending from the inner corners and making an angle of approximately 45 with the base,

.3? said crease lines converging at the middle of the outer. edges of the two outer flaps.

3. A carton in accordance with claim 2, wherein the two outer flaps of said three integral flaps are provided at their outer edges with narrow tongues which extend from the middle of the flaps to one of the edges thereof.

4. A carton in accordance with claim 3, wherein said narrow tongues extend to that edge of the two outer flaps which is facing the fourth flap, said fourth flap extending equally far beyond the carton ends as said tongues.

Referenees Cited TED STATES PATEN S Hoffman 229-14 Hogdal 229-14 Hogdal 229-14 Zinn 229-14 Moose et a1. 229-14 J-acke 229-14 w FRANKLIN T. GARRETT, Primary Examiner; 

1. A RECTANGULAR PARALLELEPICAL CARTON CONSTITUTED ON ONE HAND BY AN INTEGRAL BLANK OF CARDBOARD OR LIKE MATERIAL WHICH IS DIVIDED BY CREASE LINES INTO FOUR ALIGNED PANELS IN PAIRS OF EQUAL SIZE FOR THE FORMATION OF THE SIDES OF THE CARTON, AND INTO END FLAPS INTEGRAL WITH SAID FOUR PANELS AND ADAPTED TO FORM THE END CLOSURE MEMBERS OF THE CARTON, AND ON THE OTHER HAND BY A LINING UNSLIT AT THE CORNERS AND PROJECTING SUCH A DISTANCE BEYOND THE ENDS OF THE CARTON THAT IT IS CLOSABLE BY BELLOWS FOLDING AT THE CARTON ENDS, SAID LINING FOR SAID BELLOWS FOLDING BEING GLUED TO THREE INTEGRAL END FLAPS WHILE THE FOURTH FLAP SEPARATED FROM THE OTHER FLAPS AND FROM THE LINING IS ADAPTED, IN THE SEALED STATE OF THE CARTON, TO FORM A CLOSURE OF THE CARTON, WHEREIN THE INTERMEDIARY ONE OF THE THREE INTEGRAL END FLAPS IS OF S LENGTH EQUAL TO THE WIDTH OF THOSE TWO OPPOSED SIDES OF THE CARTON BETWEEN WHICH THE FLAP IS LOCATED, AND THE LINING PROJECTS EQUALLY FAR BEYOND THE CARTON AS SAID INTERMEDIARY FLAP WHILE THE TWO OUTER ONES OF THE THREE INTEGRAL FLAPS ARE EACH OF A LENGTH SMALLER THAN THAT OF SAID INTERMEDIARY FLAP. 